Automatic sunshade used in public places

ABSTRACT

The utility model discloses an automatic sunshade used in public places, which comprises a sunshade column arranged symmetrically in front and back, the top end of the sunshade column is fixedly provided with a light sensor, the light sensor can sense the light intensity, the structure of the invention is simple, the maintenance is convenient, the use is convenient, the installation can automatically expand or contract the sunshade according to the light intensity, and the sunshade does not need to be built manually, which saves time. Labor saving, suitable for beach or park and other places with strong sunlight and ultraviolet, can automatically shade passers-by or tourists, and provide UV protection.

CROSS-REFERENCES TO RELATED APPLICATIONS

The present application claims priority from Chinese application No. 201910616277X filed on Jul. 9, 2019 which is hereby incorporated by reference in its entirety.

TECHNICAL FIELD

The present invention relates to the field of automatic sunshade, in particular to an automatic sunshade used in public places.

BACKGROUND OF THE INVENTION

Nowadays more and more people like to go to the seaside or the park, but the strong sunlight is their trouble. The traditional sunshade needs to be built manually, which is time-consuming and laborious. At the same time, because the angle of sunlight is changing at all times, the traditional sunshade can not protect the people under the sunshade all the time, so it is necessary to develop a self-contained sunshade. A device that can automatically build a sunshade according to the intensity of light and protect people under the sunshade from sunlight in all directions.

BRIEF SUMMARY OF THE INVENTION The Technical Problem

The traditional sunshade needs to be built manually, which is time-consuming and laborious. Because the angle of sunlight is changing all the time, the traditional sunshade can not protect the people under the sunshade all the time.

In order to solve the above problems, an automatic sunshade used in public places is designed in this example. The automatic sunshade used in public places in this example includes a sunshade column symmetrically arranged in front and back. The top of the sunshade column is fixedly provided with a light sensor, which can sense the light intensity. The first fixing block is fixedly symmetrically arranged on the walls on both sides of the sunshade column. One side of the fixing block away from the light sensor is provided with a sunshade, which can shield sunlight for passers-by after being unfolded. Two ends of the sunshade are fixedly provided with snap rings. The sunshade and the first fixing block are connected by the snap rings. The lower side of the sunshade is provided with a sunshade mechanism. The sunshade is connected with the sunshade mechanism through the snap rings. When the sunshade is unfolded When the structure is in operation, it can drive the sunshade to expand or contract. The lower end of the first fixing block is fixed on the outer wall surface of the sunshade column, and the limiting plate can limit the sunshade mechanism. The top wall of the sunshade column is provided with a power control cavity, and the power control cavity is provided with a power control mechanism. When the light sensor senses the light intensity is relatively high When it is large, start the power control mechanism. The lower wall of the power control cavity is provided with a sunshade control cavity. The sunshade control cavity is provided with a sunshade control mechanism. The sunshade control mechanism is rotationally connected with the sunshade mechanism, which can drive the sunshade mechanism to operate. The lower wall of the sunshade control cavity is provided with a transmission cavity which is provided with a transmission mechanism. The moving mechanism can transfer the power of the power control mechanism to the sun shading control mechanism.

The power control mechanism includes a main motor fixed in the top wall of the power control cavity, the lower end of the main motor is connected with the main drive shaft, the outer wall of the main drive shaft is provided with a rotatable hollow shaft, the hollow shaft spline is connected with the main drive shaft, the right wall of the power control cavity is fixed with an electromagnet, and the lower end of the electromagnet is fixed with a spring. The lower end of the spring is fixedly provided with a magnetic slider, the inner wall surface of the magnetic slider is rotationally connected with the outer wall surface of the hollow shaft, the outer wall of the hollow shaft is fixedly provided with a first gear, the lower end surface of the hollow shaft is fixedly provided with a second gear, the left and right sides of the first gear are symmetrically provided with a rotatable third gear, the third gear can mesh with the first gear, and the third gear The lower end is fixedly provided with a main transmission shaft which can rotate in the lower wall of the power control cavity. The lower end of the main transmission shaft is fixedly connected with the sunshade control mechanism. By energizing the electromagnetic iron, the electromagnet drives the magnetic slider to slide downward through the spring, and then drives the hollow shaft to slide downward. The hollow shaft drives the first tooth The wheel is meshed with the third gear, when the main motor is running, it drives the main drive shaft to rotate, the main drive shaft drives the third gear to rotate through the hollow shaft and the first gear, and then drives the main drive shaft to rotate, the main drive shaft transmits the power to the sunshade control mechanism, and the lower end of the second gear can rotate with the fourth gear Wheel, the lower wall surface of the fourth gear is fixedly provided with a secondary transmission shaft, the secondary transmission shaft can be rotatably arranged between the left and right walls of the power control cavity, the lower end surface of the secondary transmission shaft is fixedly provided with a main bevel gear, the right end of the main bevel gear is provided with a secondary bevel gear, the secondary bevel gear is fixedly arranged on the outer wall surface of the main positioning shaft, the main bevel gear is meshed with the secondary bevel gear, and the main bevel gear is fixedly arranged. The position shaft is rotatable and arranged in the lower wall of the power control chamber, the outer wall surface of the main positioning shaft is fixedly provided with a first pulley, the first pulley is located at the left end of the auxiliary bevel gear, the first pulley is connected with a belt, the belt is connected with the transmission mechanism, when the electric power of the electromagnetic iron is increased, the electromagnet drives the magnetic slider to continue through the spring The first gear is separated from the third gear, the second gear is meshed with the fourth gear, the fourth gear drives the auxiliary transmission shaft to rotate, the auxiliary transmission shaft drives the main positioning shaft to rotate through the main bevel gear and the auxiliary bevel gear, and the main positioning shaft then passes through the third gear The belt pulley and the belt drive the transmission mechanism.

Wherein, the driving mechanism includes a rotatable main positioning shaft arranged in the driving cavity, the outer wall surface of the main positioning shaft is fixedly provided with a second pulley, the second pulley is connected with the belt, the two ends of the second pulley are symmetrically provided with a first driving bevel gear, the first driving bevel gear is fixedly arranged on the outer wall surface of the main positioning shaft, and the first driving bevel gear is fixedly arranged on the first driving bevel gear A second driving bevel gear is arranged at the end, the second driving bevel gear is meshed with the first driving bevel gear on the side close to the symmetrical center, the upper end face of the second driving bevel gear is fixedly provided with a auxiliary positioning shaft, the auxiliary positioning shaft can be rotatably arranged in the upper wall of the driving cavity, the upper end face of the auxiliary positioning shaft is fixedly connected with the sunshade control mechanism, and the second belt is driven by the belt The wheel rotates so that the second belt wheel drives the main positioning shaft to rotate, and the main positioning shaft drives the secondary positioning shaft to rotate through the first driving bevel gear and the second driving bevel gear, and the secondary positioning shaft then transmits the power to the sunshade control mechanism.

Wherein, the sunshade control mechanism includes a rotatable control shaft symmetrically arranged in the sunshade control cavity, a first control bevel gear is fixedly arranged on the control shaft, a second control bevel gear is arranged at the lower end of the first control bevel gear, the second control bevel gear is meshed with the first control bevel gear, and the lower end surface of the second control bevel gear is fixedly arranged with the secondary positioning shaft The second control bevel gear drives the control shaft to rotate through the first control bevel gear, and the control shaft drives the drive wheel to rotate through the second control bevel gear. The control shaft is connected with the hollow control shaft, and the hollow control shaft is connected with the hollow control shaft. A third control bevel gear is fixedly arranged on one side of the shaft away from the first control bevel gear, a fourth control bevel gear is arranged on the upper end of the third control bevel gear, the fourth control bevel gear is meshed with the third control bevel gear, the upper end of the fourth control bevel gear is fixedly connected with the lower end of the main drive shaft, and the fourth control bevel gear is driven to rotate by the main drive shaft, so as to make the fourth control bevel gear rotate. The fourth control bevel gear drives the third control bevel gear to rotate, and the third control bevel gear drives the hollow control shaft to rotate.

Wherein, the sunshade mechanism comprises a rotatable sunshade bar arranged on the outer wall surface of the control shaft, the rear end surface of the sunshade bar is fixedly connected with the hollow control shaft, the front wall of the sunshade bar is provided with two rotatable driven shafts, the front and rear ends of the driven shaft are symmetrically provided with driven wheels, the driven wheels are paved with drive belts, and the lower end of the drive belt is connected with the sunshade control cavity The drive wheel is connected, the drive belt is fixedly provided with a second fixed block, the second fixed block is connected with the sunshade through the snap ring, and when the hollow control shaft drives the sunshade rod to rotate, the sunshade mechanism can change the shielding angle, and the drive wheel drives the drive belt to rotate, the drive belt can drive the second fixed block to the left Right sliding, and the second fixing block drives the sunshade to expand or contract through the snap ring.

The invention has the advantages of simple structure, convenient maintenance and convenient use. The device can automatically expand or contract the sunshade according to the intensity of light, no need to build the sunshade manually, time-saving and labor-saving. It is suitable for the beach or park and other places with strong sunlight and ultraviolet rays, and can automatically shade passers-by or tourists, and provide ultraviolet protection, so that they do not need to Build the sunshade by yourself, and adjust the sunshade angle according to the light angle to ensure that passers-by or tourists do not need to move the position of the sunshade due to the change of the light angle.

BRIEF DESCRIPTION OF THE DRAWINGS

For ease of explanation, the invention is described in detail by the following specific embodiments and drawings.

FIG. 1 is the overall schematic structural diagram of the automatic sunshade used in public places;

FIG. 2 is the left view structure diagram of FIG. 1;

FIG. 3 is the structural diagram of “A-A” direction in FIG. 1;

FIG. 4 is an enlarged diagram of the “B” structure of FIG. 1;

FIG. 5 is an enlarged diagram of the “C” structure of FIG. 2.

DETAILED DESCRIPTION OF THE INVENTION

The invention relates to an automatic sunshade used in public places, which is mainly used in the field of automatic sunshade. The invention will be further described in combination with the drawings of the invention:

The utility model relates to an automatic sunshade used in a public place, which comprises a sunshade 21 symmetrically arranged in front and back, the top end of the sunshade 21 is fixedly provided with a light sensor 11, the light sensor 11 can sense the light intensity, the two sides of the sunshade 21 are fixedly provided with a first fixing block 12 symmetrically on the left and right sides, and the side of the first fixing block 12 far away from the light sensor 11 is provided with a sunshade 14. After the sunshade 14 is unfolded, it can shield sunlight for passers-by. The two ends of the sunshade 14 are fixedly provided with snap rings 13. The sunshade 14 and the first fixing block 12 are connected by the snap rings 13. The lower side of the sunshade 14 is provided with a sunshade mechanism 401. The sunshade 14 is connected with the sunshade mechanism 401 through the snap rings 13. When the sunshade mechanism 401 operates, it can drive the sunshade mechanism 401. The sunshade 14 expands or contracts, the lower end of the first fixing block 12 is located on the outer wall surface of the sunshade 21, and the limiting plate 22 can limit the sunshade 401, the top wall of the sunshade 21 is provided with a power control cavity 100, and the power control mechanism 101 is provided in the power control cavity 100, when the light sensor 11 senses a large light intensity The power control mechanism 101 is activated, the lower wall of the power control cavity 100 is provided with a sunshade control cavity 200, the sunshade control cavity 200 is provided with a sunshade control mechanism 201, the sunshade control mechanism 201 is rotationally connected with the sunshade mechanism 401, thereby driving the sunshade mechanism 401 to operate, the lower wall of the sunshade control cavity 200 is provided with a transmission cavity 300, and the transmission cavity 300 The transmission mechanism 301 can transmit the power of the power control mechanism 101 to the sunshade control mechanism 201.

According to the embodiment, the power control mechanism 101 is described in detail below. The power control mechanism 101 includes a main motor 37 fixed in the top wall of the power control cavity 100. The lower end of the main motor 37 is power connected with the main drive shaft 38, the outer wall of the main drive shaft 38 is provided with a rotatable hollow shaft 41, and the hollow shaft 41 is splined with the main drive shaft 38. The right wall of the power control cavity 100 is fixedly provided with an electromagnet 54, the lower end of the electromagnet 54 is fixedly provided with a spring 55, the lower end of the spring 55 is fixedly provided with a magnetic slider 39, the inner wall surface of the magnetic slider 39 is rotationally connected with the outer wall surface of the hollow shaft 41, the outer wall of the hollow shaft 41 is fixedly provided with a first gear 42, the lower end surface of the hollow shaft 41 is fixedly provided with a second gear 44, and the left sides of the first gear 42 are fixedly provided The third gear 43 can mesh with the first gear 42, the lower end of the third gear 43 is fixedly provided with the main transmission shaft 45, the main transmission shaft 45 can rotate in the lower wall of the power control cavity 100, the lower end of the main transmission shaft 45 is fixedly connected with the sunshade control mechanism 201, and the electromagnet 54 is electrified to make the electromagnet 54 the spring 55 drives the magnetic slider 39 to slide downward, and then drives the hollow shaft 41 to slide downward. The hollow shaft 41 drives the first gear 42 to engage with the third gear 43. When the main motor 37 operates, it drives the main drive shaft 38 to rotate, and the main drive shaft 38 drives the third gear 43 to rotate through the hollow shaft 41 and the first gear 42 And then drive the main transmission shaft 45 to rotate, and the main transmission shaft 45 then transmits the power to the sunshade control mechanism 201. The lower end of the second gear 44 is rotatably provided with the fourth gear 46, the lower wall surface of the fourth gear 46 is fixedly provided with the auxiliary transmission shaft 47, the auxiliary transmission shaft 47 is rotatably arranged between the left and right walls of the power control cavity 100, and the lower end surface of the auxiliary transmission shaft 47 A main bevel gear 48 is fixedly arranged, the right end of the main bevel gear 48 is provided with a sub bevel gear 52, the sub bevel gear 52 is fixedly arranged on the outer wall surface of the main positioning shaft 53, the main bevel gear 48 is meshed with the sub bevel gear 52, the main positioning shaft 53 is rotatably arranged in the lower wall of the power control cavity 100, the outer wall surface of the main positioning shaft 53 is fixedly arranged with a first belt wheel 51, and the first belt wheel 51 is arranged on the outer wall surface of the main positioning shaft 53. At the left end of the secondary bevel gear 52, the first belt wheel 51 is connected with a belt 49, which is connected with the transmission mechanism 301. When the power of the electromagnet 54 is increased, the electromagnet 54 drives the magnetic slider 39 to slide downward through the spring 55, and then the hollow shaft 41 is driven to slide downward. The first gear 42 is separated from the third gear 43. The second gear 44 meshes with the fourth gear 46, the fourth gear 46 drives the sub drive shaft 47 to rotate, the sub drive shaft 47 drives the main positioning shaft 53 to rotate through the main bevel gear 48 and the sub bevel gear 52, the main positioning shaft 53 further drives the transmission mechanism 301 through the first belt wheel 51 and the belt 49.

According to the embodiment, the transmission mechanism 301 includes a rotatable main positioning shaft 29 arranged in the transmission cavity 300. The second pulley 31 is fixedly arranged on the outer wall surface of the main positioning shaft 29. The second pulley 31 is connected with the belt 49. The two ends of the second pulley 31 are symmetrically arranged with the first driving bevel gear 28, and the first driving bevel gear 28. The bevel gear 28 is fixed on the outer wall surface of the main positioning shaft 29, the upper end of the first driving bevel gear 28 is provided with the second driving bevel gear 27, the second driving bevel gear 27 is meshed with the first driving bevel gear 28 on the side close to the symmetrical center, the upper end surface of the second driving bevel gear 27 is provided with the auxiliary positioning shaft 26, and the auxiliary positioning shaft 26 is rotatably arranged in the upper wall of the transmission cavity 300. The upper end face of the auxiliary positioning shaft 26 is fixedly connected with the sunshade control mechanism 201, and the second pulley 31 is driven to rotate by the belt 49, so that the second pulley 31 drives the main positioning shaft 29 to rotate, and the main positioning shaft 29 drives the auxiliary positioning shaft 26 to rotate by the first driving bevel gear 28 and the second driving bevel gear 27, and the auxiliary positioning shaft 26 then moves The force is transmitted to the sunshade control mechanism 201.

According to the embodiment, the sunshade control mechanism 201 is described in detail below. The sunshade control mechanism 201 includes a rotatable control shaft 18 symmetrically arranged in the sunshade control cavity 200, the control shaft 18 is fixedly provided with a first control bevel gear 33, the lower end of the first control bevel gear 33 is provided with a second control bevel gear 25, the second control bevel gear 25 and the first control bevel gear 25 The lower end face of the second control bevel gear 25 is fixedly connected with the auxiliary positioning shaft 26, the left and right symmetrical driving wheels 23 are fixedly arranged on the control shaft 18, the second control bevel gear 25 is driven to rotate by the auxiliary positioning shaft 26, the second control bevel gear 25 is driven to rotate by the first control bevel gear 33, and the control shaft 18 is advanced by the second control bevel gear 25 While driving the drive wheel 23 to rotate, the control shaft 18 is rotationally connected with a hollow control shaft 34, the side of the hollow control shaft 34 away from the first control bevel gear 33 is fixedly provided with a third control bevel gear 35, the upper end of the third control bevel gear 35 is provided with a fourth control bevel gear 36, the fourth control bevel gear 36 is meshed with the third control bevel gear 35, and the fourth control bevel gear 36 is meshed with the third control bevel gear 35. The upper end face of the bevel gear 36 is fixedly connected with the lower end face of the main transmission shaft 45, and the fourth control bevel gear 36 is driven to rotate by the main transmission shaft 45, so that the fourth control bevel gear 36 drives the third control bevel gear 35 to rotate, and the third control bevel gear 35 further drives the hollow control shaft 34 to rotate.

According to the embodiment, the sunshade mechanism 401 is described in detail below. The sunshade mechanism 401 includes a rotatable sunshade bar 19 arranged on the outer wall surface of the control shaft 18, the rear end face of the sunshade bar 19 is fixedly connected with the hollow control shaft 34, the front wall of the sunshade bar 19 is provided with two rotatable driven shafts 56, and the front and rear ends of the driven shaft 56 are symmetrically provided with driven wheels 17, and the front and rear ends of the driven shaft 56 are symmetrically provided with driven wheels 17. The driving wheel 17 is paved with a driving belt 16, the lower end of the driving belt 16 is connected with the driving wheel 23 in the sunshade control cavity 200, and the driving belt 16 is fixedly provided with a second fixing block 15, which is connected with the sunshade 14 through the snap ring 13, so that when the hollow center control shaft 34 drives the sunshade 19 to rotate, the sunshade mechanism 401 can change the shielding angle At the same time, when the drive wheel 23 drives the drive belt 16 to rotate, the drive belt 16 can drive the second fixed block 15 to slide left and right, and the second fixed block 15 can drive the sunshade 14 to expand or contract through the snap ring 13.

The following is a detailed description of the use steps of an automatic sunshade used in a public place in this paper in combination with FIGS. 1 to 5: when the light sensor 11 detects that sunshade is needed, the light sensor 11 controls the main motor 37 to start, the main motor 37 drives the main drive shaft 38 to rotate, the main drive shaft 38 drives the hollow shaft 41 to rotate, and the hollow shaft 41 drives the first gear 42 and the second gear 44 to rotate at the same time. At this time, the electromagnet 54 is energized, the magnetic slider 39 is driven to slide down by the spring 55, the hollow shaft 41 is driven to slide down by the magnetic slider 39, the second gear 44 is meshed with the fourth gear 46, and the fourth gear 46 is driven to rotate the secondary drive shaft 47, the secondary drive shaft 47 is driven to rotate the main positioning shaft 53 through the main bevel gear 48 and the secondary bevel gear 52, and the main positioning shaft 53 is driven to rotate the second. The belt pulley 51 rotates, the first pulley 51 drives the second pulley 31 to rotate through the belt 49, the second pulley 31 drives the main positioning shaft 29 to rotate, the main positioning shaft 29 drives the auxiliary positioning shaft 26 to rotate through the first driving bevel gear 28 and the second driving bevel gear 27, the auxiliary positioning shaft 26 drives the control shaft 18 to rotate through the second control bevel gear 25 and the first control bevel gear 33, and the control shaft 18 drives the control shaft 18 to rotate through the driving wheel 23. When the driving belt 16 is rotated, the driving belt 16 drives the second fixing block 15 to move to the outside of the symmetrical center, and the second fixing block 15 drives the sunshade 14 to expand through the snap ring 13, so as to provide sunshade for passers-by. When the angle needs to be adjusted, the current of the electromagnet 54 is reduced, and the magnetism of the electromagnet 54 is weakened, so that the magnetic slider 39 slides upward under the elastic force of the spring 55, and the hollow is driven at this time. The shaft 41 slides upward, so that the hollow shaft 41 drives the first gear 42 and the second gear 44 to slide upward, so that the second gear 44 is separated from the fourth gear 46, the first gear 42 is meshed with the third gear 43, the first gear 42 drives the third gear 43 to rotate, the third gear 43 drives the main transmission shaft 45 to rotate, and the main transmission shaft 45 is driven by the fourth control bevel gear 36 and the third control bevel gear 35 The hollow control shaft 34 rotates, and the hollow control shaft 34 drives the sunshade rod 19 to rotate, thereby adjusting the angle of the sunshade mechanism 401.

The invention has the advantages of simple structure, convenient maintenance and convenient use. The device can automatically expand or contract the sunshade according to the intensity of light, no need to build the sunshade manually, time-saving and labor-saving. It is suitable for the beach or park and other places with strong sunlight and ultraviolet rays, and can automatically shade passers-by or tourists, and provide ultraviolet protection, so that they do not need to Build the sunshade by yourself, and adjust the sunshade angle according to the light angle to ensure that passers-by or tourists do not need to move the sunshade position due to the change of light angle.

The above is only the specific embodiment of the invention, but the scope of protection of the invention is not limited to this. Any change or replacement without thinking of creative labor shall be covered in the scope of protection of the invention. Therefore, the scope of protection of the invention shall be subject to the scope of protection defined in the claims. 

1. An automatic sunshade used in public places, comprising the a sunshade column arranged symmetrically in front and back, the top end of the sunshade column is fixedly provided with a light sensor which can sense the light intensity; a first fixing block is fixedly arranged symmetrically on the left and right sides of the two side walls of the sunshade, a sunshade is arranged on the side of the first fixing block which is far away from the light sensor, a snap ring is fixedly arranged on both ends of the sunshade, the sunshade and the first fixing block are connected by the snap ring, a sunshade mechanism is arranged on the lower side of the sunshade, and the sunshade is connected with the sunshade mechanism through the snap ring To be connected; the lower end of the first fixing block is arranged on the outer wall surface of the sunshade column with a limited position plate; the top wall of the sunshade column is provided with a power control cavity, the power control cavity is provided with a power control mechanism, the lower wall of the power control cavity is provided with a sunshade control cavity, the sunshade control cavity is provided with a sunshade control mechanism, and the sunshade control mechanism is rotationally connected with the sunshade mechanism; the lower wall of the sunshade control cavity is provided with a transmission cavity, and the transmission cavity is provided with a transmission mechanism.
 2. The automatic sunshade used in public places as defined in claim 1, wherein The power control mechanism includes a main motor fixed in the top wall of the power control cavity, the lower end of the main motor is dynamically connected with the main drive shaft, the outer wall of the main drive shaft is provided with a rotatable hollow shaft, and the hollow shaft spline is connected with the main drive shaft; The right wall of the power control cavity is fixedly provided with an electromagnet, the lower end of the electromagnet is fixedly provided with a spring, the lower end of the spring is fixedly provided with a magnetic slide block, the inner wall surface of the magnetic slide block is rotationally connected with the outer wall surface of the hollow shaft, the outer wall of the hollow shaft is fixedly provided with a first gear, the lower end surface of the hollow shaft is fixedly provided with a second gear, the two sides of the first gear are symmetrically provided with rotatable gears The third gear can mesh with the first gear, the lower end of the third gear is fixedly provided with a main transmission shaft, the main transmission shaft can rotate in the lower wall of the power control cavity, and the lower end of the main transmission shaft is fixedly connected with the sunshade control mechanism; The lower end of the second gear is rotatably provided with a fourth gear, the lower wall surface of the fourth gear is fixedly provided with a secondary transmission shaft, the secondary transmission shaft is rotatably arranged between the left and right walls of the power control cavity, the lower end surface of the secondary transmission shaft is fixedly provided with a main bevel gear, the right end of the main bevel gear is fixedly provided with a secondary bevel gear, the secondary bevel gear is fixedly arranged on the outer wall surface of the main positioning shaft, and the main bevel gear The bevel gear is meshed with the auxiliary bevel gear; The main positioning shaft is rotatably arranged in the lower wall of the power control cavity, the outer wall surface of the main positioning shaft is fixedly provided with a first pulley, the first pulley is located at the left end of the secondary bevel gear, the first pulley is connected with a belt, and the belt is connected with the transmission mechanism.
 3. The automatic sunshade used in public places as defined in claim 1, wherein The transmission mechanism comprises a rotatable main positioning shaft arranged in the transmission cavity, the outer wall surface of the main positioning shaft is fixedly provided with a second belt pulley which is connected with the belt; The two ends of the second belt wheel are symmetrically provided with a first driving bevel gear, the first driving bevel gear is fixed on the outer wall surface of the main positioning shaft, the upper end of the first driving bevel gear is provided with a second driving bevel gear, the second driving bevel gear is meshed with the first driving bevel gear on the side close to the symmetrical center, and the upper end surface of the second driving bevel gear is provided with a secondary positioning shaft. The auxiliary positioning shaft is rotatably arranged in the upper wall of the transmission cavity, and the upper end surface of the auxiliary positioning shaft is fixedly connected with the sunshade control mechanism.
 4. The automatic sunshade used in public places as defined in claim 1, wherein The sunshade control mechanism includes a rotatable control shaft symmetrically arranged in the sunshade control cavity, a first control bevel gear is fixedly arranged on the control shaft, a second control bevel gear is arranged at the lower end of the first control bevel gear, the second control bevel gear is meshed with the first control bevel gear, and the lower end surface of the second control bevel gear is fixedly connected with the auxiliary positioning shaft. The left and right symmetrical driving wheels are fixedly arranged on the control shaft; The control shaft is rotationally connected with a hollow control shaft, the hollow control shaft is fixedly provided with a third control bevel gear on one side away from the first control bevel gear, the upper end of the third control bevel gear is provided with a fourth control bevel gear, the fourth control bevel gear is meshed with the third control bevel gear, and the upper end face of the fourth control bevel gear is fixedly connected with the lower end face of the main transmission shaft.
 5. The automatic sunshade used in public places as defined in claim 1, wherein The sunshade mechanism comprises a rotatable sunshade bar arranged on the outer wall surface of the control shaft, the rear end surface of the sunshade bar is fixedly connected with the hollow control shaft, the front wall of the sunshade bar is provided with two rotatable driven shafts, the front and rear ends of the driven shaft are symmetrically provided with driven wheels, the driven wheels are paved with a drive belt, and the lower end of the drive belt is connected with the sunshade control cavity. The driving wheel is connected, and the drive belt is fixedly provided with a second fixed block which is connected with the sun visor through the snap ring. 